I am the Imperial Admiral
ThunderStorm
Effect: Elite Minors and Majors become Ultras, Grey Stealth Elites become Brown Stealth Elites and Brown Heretic Elites become Gold Heretics. Rangers, Honor Guards, Councilors, Zealots and Spec-Ops Elites are unaffected.
Mythic Skull
Enemies have more health and shielding, and are therefore harder to kill. Note: health and shielding increase more as the enemies rise in rank. A blue Elite Minor will gain a small bit of health, but an Ultra Elite will gain a ridiculous amount of both shielding and health, to the point that a Plasma Pistol overcharge won't drop their shields even halfway. Besides that, it also makes your allies gain a small bit of health, and the Skull will make allies and enemys immune to being meleed.
Ghost Skull
Effect: Characters will not flinch from attacks, melee or otherwise.